Improvement in boilers for heating buildings



A. E. HHTCHINGS.

Steam Heater.

Patented Nov. .24, 1857.

Fig 2 ig! I UNITED STATES PATENT OFFICE.

ANTHONY ELLIS HITCHINGS, OF NElV YORK, N. Y.

IMPROVEMENT INBOILERS F-OR HEATING BUILDINGS.

Specification forming part of Letters Patent No. I 5,693, dated November 24, 1857.

To aZZ whom it may concern:

Be it known that I, ANTHONY ELLIS HITCH- INGs, of the city, county, and State of New York, have invented a new and Improved Boiler for Heating Buildings, Greenhouses, &c., by Hot \Vater or Steam; and Ido hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which Figures 1 and 2 are vertical central sections at right angles to each other of myimproved boiler. Fig. 3 is a horizontal section of the same in the line or :10 of Figs. 1 and 2.

Similar letters of reference indicate corresponding parts in the several figures.

A is a hollow upright frustum ot' a cone constituting the outer shell of the boiler.

13 is a smaller hollow frustu m of a cone with an open bot tom arranged concentrically within the shell A and united therewith at the bottom, so as to form a hollow conical waterjacket.

D is an upright fiat-sided chamber extending in one direction nearly all across the space within the water-jacket, as shown in Figs. 2 and 3, but being quite narrow in the other direction, as shown in Figs. 1 and 3, said chamber communicating at the bottom by a pas sage a and at the top by an open neck b with the interior of the water-jacket A B.

E is the inlet or feed pipe, entering the water-jacketA B near the bottom, and F is the outlet or steam pipe connecting with the top of the water-jacket.

I is the firedoor.

H is the smoke-pipe.

The boiler as above constructed is to be placed concentrically on a fire-brick coping on the top of a circular wall, with the firegrate below the fire'brick coping, so that the flame and heated products of combustion from the fire will play all round the inner surface of the water-jacket and the outer surface of the water-chamber. This boiler presen ts a very large heating-surface surrounded or covered bya small body of water, yetwith a sufficient quantity to prevent its being carried out by a rapid generation of steam, and

by this arrangement the heating-surface is exposed not only to the contact of the flame and heated products of combustion from the fire, but also to the radiated heat from the bed of fuel, the narrowness of the inner chamber D allowing the rays of heat to strike not only its own broad flat sides,but the inclined inner surface ofthe water-jacket. It is in this latter peculiarity that the advantage of my invention consists, for if a central chamber were made round of the same capacity as D the efiect of the radiated heat would be in a great measure lost, besides which that form of the chamber would present a much less area of heating-surface. By the fiat form of the central chamber I also obtain all the advantages of tubes with a cheaper construction, as the whole boiler can be constructed of cast.- iron, which is strong enough for the purposes for which the boiler is intended.

I do not claim of itself the conical waterjacket with the fire in the center; but

\Vhat' I claim as my invention, and desire to secure by Letters Patent, is

The arrangement within the upright conical water-jacket A B of the upright fiat-sided central water-chamber D, extending nearly across the said jacket in one direction, but made narrow in a transverse direction, substantially as and for the purpose set forth.

ANTHONY ELLIS HITCHINGS.

Vitnesses:

W. TUSCH, J. W. OooMBs. 

